<!DOCTYPE HTML>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>if...else</title>
  <script type="text/JavaScript">
    var mymoney,sum=0;//mymoney变量存放不同面值，sum总计
for(mymoney=1;mymoney<=10;mymoney++)
{ 
  sum= sum + mymoney;
}
  document.write("sum合计:"+sum);
</script>
</head>

<body>
</body>

</html>